Datasheet

5
LT3437
3437fc
TEMPERATURE (°C)
–50
I
VIN
(µA)
800
700
600
500
400
300
200
100
0
110
3437 G08
–10 30 70 15090–30 10 50 130
RUN MODE
SLEEP MODE
TEMPERATURE (°C)
0
I
VIN
(µA)
200
400
600
100
300
500
–10 30 70 110
3437 G07
150–30–50 10 50 90 130
RUN MODE
SLEEP MODE V
BIAS
= 0V
SLEEP MODE V
BIAS
= 5V
Efficiency and Power Loss
vs Load Current
LOAD CURRENT (mA)
0.1
0
EFFICIENCY (%)
20
10
40
50
60
100
100
3437 G01
30
1 10 1000
70
80
90
500
450
400
350
300
250
200
150
100
50
0
POWER LOSS (mW)
EFFICIENCY
POWER LOSS
V
IN
= 12V
V
OUT
= 3.3V
T
A
= 25°C
1.20
FB VOLTAGE (V)
1.24
1.30
1.22
1.28
1.26
TEMPERATURE (°C)
3437 G02
–50 0 50 75–25 25 100 150125
TEMPERATURE (°C)
150
FREQUENCY (kHz)
160
180
190
200
220
3437 G03
170
230
240
250
210
–50 0 50 75–25 25 100 150125
VOLTAGE (V)
1.35
3437 G04
1.20
1.10
1.40
1.45
1.50
1.30
1.25
1.15
TEMPERATURE (°C)
–50 0 50 75–25 25 100 150125
V
SHDN
(V)
0
0
I
SHDN
(µA)
2
4
6
10
20
30 40
3437 G05
50
8
10
60
CURRENT (µA)
3437 G06
6
4
2
0
10
8
16
14
12
22
18
TEMPERATURE (°C)
20
–50 0 50 75–25 25 100 150125
V
VIN
= 80V
V
VIN
= 12V
V
VIN
= 60V
TEMPERATURE (°C)
0
PEAK SWITCH CURRENT (mA)
200
100
300
400
500
600
700
800
3437 G09
–50 0 50 75–25 25 100 150125
TYPICAL PERFOR A CE CHARACTERISTICS
UW
FB Voltage vs Temperature
Oscillator Frequency
vs Temperature
SHDN Threshold
Shutdown Supply Current
vs Temperature
Input Current vs Temperature Bias Current vs Temperature
Switch Peak Current Limit
vs Temperature
SHDN Pin Current